2.4.99.20	D147V	mutation has minimal effects on pH-dependence of the enzyme	727857	
2.4.99.20	D155N	mutation eliminates the strong pH dependence of the catalyzed reactions	727857	
2.4.99.20	D155Q	mutation eliminates the strong pH dependence of the catalyzed reactions	727857	
2.4.99.20	D155Q	mutation preserves the strong pH dependence of the catalyzed reactions	727857	
2.4.99.20	E146A	mutation eliminates the strong pH dependence of the catalyzed reactions	727857	
2.4.99.20	E146G	mutation eliminates the strong pH dependence of the catalyzed reactions	727857